If you'd like to switch up where your products are sitting on your shop, you can simply drag and drop products up and down on the Shop > Products page on your dashboard. When you've done this, go to your shop and you'll see the product in its new position.
Dragging a product to the top of the products list will mean it shows up first when someone visits your shop.
This is a good exercise to do if you've also have lots of products on your shop and you'd like to show off your newest or best-selling products nearer the top so people notice them first.
Also, if you have older, inactive products on your dashboard then dragging them down the products list is a good idea to keep the list easier to navigate.